20901784

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{60761}}^1$

素因数の和:60810

約数の個数: 16

約数和(自身を含む): 40102920

約数和(自身を除く): 19201136

約数列:

[1, 2, 4, 8, 43, 86, 172, 344, 60761, 121522, 243044, 486088, 2612723, 5225446, 10450892, 20901784]

約数ペア:

[(1, 20901784), (2, 10450892), (4, 5225446), (8, 2612723), (43, 486088), (86, 243044), (172, 121522), (344, 60761)]